HTTPUpgrade (#483)
* Some updates in the English version of docs. * HTTPUpgrade * Include HTTPUpgrade in build. * Minor changes for parity. The English docs seems to be terribly outdated...pull/488/head
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# Metrics
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A more straightforward (and hopefully better) way to export metrics.
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## Related configurations
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It's possible to add a metrics inbound among inbounds.
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```json
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"inbounds": [
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{
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"listen": "127.0.0.1",
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"port": 11111,
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"protocol": "dokodemo-door",
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"settings": {
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"address": "127.0.0.1"
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},
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"tag": "metrics_in"
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}
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]
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```
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And add routing rules regarding the metrics inbound in the routing configuration.
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```json
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"routing": {
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"rules": [
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{
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"type": "field",
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"inboundTag": [
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"metrics_in"
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],
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"outboundTag": "metrics_out"
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}
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]
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}
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```
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Then finally, enable metrics under the root object.
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```json
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"metrics": {
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"tag": "metrics_out"
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}
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```
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## Usage
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### pprof
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Access `http://127.0.0.1:11111/debug/pprof/` or use go tool pprof to start profiling or inspect running goroutines.
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### expvars
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Access `http://127.0.0.1:11111/debug/vars`
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Variables exported include:
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* `stats` includes statistics about inbounds, outbounds and users
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* `observatory` includes observatory results
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for example with [luci-app-xray](https://github.com/yichya/luci-app-xray) you are likely to get a result like this (standard expvar things like `cmdline` and `memstats` are omitted)
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<details><summary>Click to expand</summary><br>
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```json
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{
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"observatory": {
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"tcp_outbound": {
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"alive": true,
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"delay": 782,
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"outbound_tag": "tcp_outbound",
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"last_seen_time": 1648477189,
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"last_try_time": 1648477189
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},
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"udp_outbound": {
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"alive": true,
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"delay": 779,
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"outbound_tag": "udp_outbound",
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"last_seen_time": 1648477191,
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"last_try_time": 1648477191
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}
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},
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"stats": {
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"inbound": {
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"api": {
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"downlink": 0,
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"uplink": 0
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},
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"dns_server_inbound_5300": {
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"downlink": 14286,
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"uplink": 5857
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},
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"http_inbound": {
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"downlink": 74460,
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"uplink": 10231
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},
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"https_inbound": {
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"downlink": 0,
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"uplink": 0
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},
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"metrics": {
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"downlink": 6327,
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"uplink": 1347
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},
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"socks_inbound": {
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"downlink": 19925615,
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"uplink": 5512
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},
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"tproxy_tcp_inbound": {
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"downlink": 4739161,
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"uplink": 1568869
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},
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"tproxy_udp_inbound": {
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"downlink": 0,
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"uplink": 2608142
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}
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},
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"outbound": {
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"blackhole_outbound": {
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"downlink": 0,
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"uplink": 0
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},
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"direct": {
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"downlink": 97714548,
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"uplink": 3234617
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},
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"dns_server_outbound": {
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"downlink": 7116,
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"uplink": 2229
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},
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"manual_tproxy_outbound_tcp_1": {
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"downlink": 0,
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"uplink": 0
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},
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"manual_tproxy_outbound_udp_1": {
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"downlink": 0,
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"uplink": 0
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},
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"tcp_outbound": {
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"downlink": 23873238,
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"uplink": 1049595
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},
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"udp_outbound": {
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"downlink": 639282,
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"uplink": 74634
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}
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},
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"user": {}
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}
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}
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```
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</details>
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To get a better view of these numbers, [Netdata](https://github.com/netdata/netdata) (with python.d plugin) is a great option:
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1. Edit related configuration file (`sudo /etc/netdata/edit-config python.d/go_expvar.conf`)
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2. Take the following configuration file as an example:
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<details><summary>Click to expand</summary><br>
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```
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xray:
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name: 'xray'
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update_every: 2
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url: 'http://127.0.0.1:11111/debug/vars'
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collect_memstats: false
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extra_charts:
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- id: 'inbounds'
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options:
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name: 'inbounds'
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title: 'Xray System Inbounds'
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units: bytes
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family: xray
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context: xray.inbounds
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chart_type: line
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lines:
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- expvar_key: stats.inbound.tproxy_tcp_inbound.downlink
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id: 'tcp.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.tproxy_udp_inbound.downlink
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id: 'udp.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.http_inbound.downlink
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id: 'http.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.https_inbound.downlink
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id: 'https.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.socks_inbound.downlink
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id: 'socks.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.tproxy_tcp_inbound.uplink
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id: 'tcp.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.tproxy_udp_inbound.uplink
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id: 'udp.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.http_inbound.uplink
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id: 'http.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.https_inbound.uplink
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id: 'https.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.inbound.socks_inbound.uplink
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id: 'socks.uplink'
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algorithm: incremental
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expvar_type: int
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- id: 'outbounds'
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options:
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name: 'outbounds'
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title: 'Xray System Outbounds'
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units: bytes
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family: xray
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context: xray.outbounds
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chart_type: line
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lines:
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- expvar_key: stats.outbound.tcp_outbound.downlink
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id: 'tcp.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.outbound.udp_outbound.downlink
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id: 'udp.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.outbound.direct.downlink
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id: 'direct.downlink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.outbound.tcp_outbound.uplink
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id: 'tcp.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.outbound.udp_outbound.uplink
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id: 'udp.uplink'
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algorithm: incremental
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expvar_type: int
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- expvar_key: stats.outbound.direct.uplink
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id: 'direct.uplink'
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algorithm: incremental
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expvar_type: int
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- id: 'observatory'
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options:
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name: 'observatory'
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title: 'Xray Observatory Metrics'
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units: milliseconds
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family: xray
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context: xray.observatory
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chart_type: line
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lines:
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- expvar_key: observatory.tcp_outbound.delay
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id: tcp
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expvar_type: int
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- expvar_key: observatory.udp_outbound.delay
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id: udp
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expvar_type: int
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```
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</details>
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And you will get a nice plot like this:
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### Additional
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Maybe reusing the empty object `stats` in config file is better than adding `metrics` here?
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**Edit:** removed prometheus related things and added usage about expvars
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@ -0,0 +1,35 @@
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# HttpUpgrade
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A WebSocket-like transport protocol implementing the HTTP/1.1 upgrade and response, allowing it to be reverse proxied by web servers or CDNs just like WebSocket, but without the need to implement the remaining portions of the WebSocket protocol, yielding better performance.
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Standalone usage is not recommended, but rather in conjunction with other security protocols like TLS.
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## HttpUpgradeObject
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The `HttpUpgradeObject` corresponds to the `httpupgradeSettings` section under transport configurations.
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```json
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{
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"acceptProxyProtocol": false,
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"path": "/",
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"host": "xray.com"
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}
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```
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> `acceptProxyProtocol`: true | false
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For inbounds only. Specifies whether to accept the PROXY protocol.
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The [PROXY protocol](https://www.haproxy.org/download/2.2/doc/proxy-protocol.txt) is used to pass the real IP address and port of a connection along. **Ignore it if you have no knowledge regarding this**.
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Common reverse proxies (e.g. HAProxy, NGINX) and VLESS fallbacks xver can be configured for its inclusion.
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When `true`, the downstream must first send PROXY protocol version 1 or 2 after establishing the underlying TCP connection, or the connection will be closed.
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> `path`: string
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HTTP path used by the HTTPUpgrade connection. Defaults to `"/"`.
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> `host`: string
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HTTP Host sent by the HTTPUpgrade connection. Empty by default.
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